What’s Vulnerable › Vulnerabilities

CVE-2026-68334: rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix io_thread race in rxrpc_wake_up_io_thread() rxrpc_wake_up_io_thread() checks local->io_thread before waking it, but then reloads the pointer for wake_up_process(). local->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so the second load can see NULL even if the first load did not. Take a READ_ONCE() snapshot and use it for both the NULL check and the wake_up_process() call, as rxrpc_encap_rcv() already does.

Affected products

• Linux kernel: 6.16 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514
• https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71
• https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288

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